From http://en.wikipedia.org/wiki/Cisplatin1- the dashed line appear to be no more than just a representation of the 3 H bond between G and C not an accurate representation.2- Cis-platin do intra strand and interstrand crosslinking. Both interfere with replication (I suspect intrastrand crosslinking might even change the correct DNA structure) sterically and by prevent correct unzipping of the DNA double helix

Patrick

Science has proof without any certainty. Creationists have certainty without
any proof. (Ashley Montague)